Art of and apparatus for making brake-shoes



2 sheet -sheet 1.

(No Model.)

0. T,. SGHOEN ART OF AND APPARATUS FOR MAKING BRAKE SHOE S. No. 484,866.

wPatented Oct. 25, 1892.

2 Sheets-Sheet (No Model.)

0. T. SOHHOEN. ART .OF ND APPARATUS FOR MAKING BRAKE SHOES. No. 484,866.

Patented Oct. 25, 1892.

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UNITED STATES PATENT OFFICE.

CHARLES T. SOHOEN, OF ALLEGHENY, PENNSYLVANIA.

ART OF AND APPARATUS FOR MAKING BRAKE-SHOES.

SPECIFICATION forming part of Letters Patent No. 484,866, dated October 25, 1892.

Application filed April 27, 1892.

To to whom it may concern.-

Be it known that I, CHARLES T. SCHOEN, a citizen of the United States, residing at Allegheny in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvement in Processes of and Apparatus for Making Brake-Shoes, of which the following is a full, clear, and exact description.

The object of this invention is to provide for the manufacture of the forged-steel brakeshoe which forms the subject of my companion application of even date, patented September 6, 1892, No. 481,973.

In practicing my invention I take a rectangular blank of appropriate metal, preferably flat bar-steel, of greater length than the finished article, and subject it to the action of dies by which the blank is first opened up to receive a foreign clip, and the openings then closed about such clip and the two welded together and the lips and lugs formed and the shoe finished by condensing or compressing the metal lengthwise and crosswise, all as I will proceed now more particularly to set forth and finally claim.

In the accompanying drawings, illustrating my invention, in the several figures of which like parts are similarly designated, Figure l is a side elevation of my shoe. Fig. 2 is a section on line 0c 00 of Figs. 1 and 3. Fig. 3 is a plan, and Fig. 2 is a section on line 00'- a," of Figs. 1 and 3. Fig. 4 shows in plan and crosssection a blank. Fig. 5 is a plan, Fig. 6 a longitudinal vertical section, and Fig. 7 a vertical cross-section on line y y of Figs. 5 and 6, of the first-operation dies of one apparatus for forging my brake-shoe. Figs. 8 and 9 are respectively a plan and side elevation of the product of the first-operation dies with the clip set in position. Fig. 10 is a section on line 10 10 of Figs. 8 and 9. Fig. 11 shows a plan and edge view of the clip-blank. Fig. 12 is a longitudinal vertical section, Fig. 13 a vertical cross-section on line 2' 2, Fig. 12, and Fig. 14-, a vertical cross-section on line zz', Fig. 12, of the finishing-dies; and Fig. 15 is a plan of the said finishing-dies.

In making a forged-steel shoe in accordance with the master car-builders standard and of the design shown in Figs. 1, 2, 2, and 3, I employ for the body a of the shoe a blank of Serial No. 430,836. (No model.)

merchant steel or wrought metal, and by dies, as I will describe, form thereon the lips 11 b and lugs c for holding the shoe in the shoehead against lateral movement. The clip d,

by which the shoe is locked or keyed to or in the shoe-head, is formed of a separate piece of metal, as shown in Figs. 10 and 11, and is embedded or welded in the body a.

The blank 6, from which the body of the shoe is forged, is longer than the shoe, and is heated and then subjected to the action of the first-operation dies, Figs. 5, 6, and '7, of which f is the male die, having the projections g, the outer faces of which are vertical, their inner faces inclined, and their edges also inclined to the outer faces, essentially as represented in Fig. 7. The female die 72. has its matrix provided with the cavities z' opposite the projections of the male die. WVhen the male die is brought down upon the blank in From a blankj, such as shown in Fig. 11,

I form a clip 01 of the shape shown in Fig. 10 and having its lower ends flared outwardly. This clip has its flared and beveled ends inserted in the cavities made in the blank, and then the blank is removed to the finishingdies, Figs. 12 to 15. Of these dies 10 is the male, having the cavity Z and surrounding walls to encompass the clip d, the cavities m m for forming the lips 19, and the projections n for forming the lugs c. The female die 0 has a matrix of considerably-greater depth than the thickness of the blank and its sides are provided at their upper portions with the cavities 19 (see Fig. 13) to receive the dis placed portions of the blank. This matrix is shorter and narrower in its bottom than the blank, or, in other words, is of the dimensions of the finished shoe. Moreover, the finishingdies are of a diflierent (greater) radius than the first-operation dies. It follows, therefore,

that in the operation of these finishing-dies the blank will be compressed and condensed crosswise and lengthwise, and so the displaced metal will be returned and pressed around 5 the clip both endwise and sidewise, and the clip thereby will be bound securely in place. It will be observed that the metal displaced into the cavities 'i of the first-operation dies is replaced by the blanks passage through the cavities p as the blank goes home in the finishing-dies, and hence there is no liability of shearing it. The angles of the blank bounded by the lines q 1' s (1, Fig. 9, form the material from which the ends of the shoe are r 5 constructed. By my invention I am enabled to make a forged-steel brake-shoe at less cost than steel castings or composite shoes, and from a steel of much softer grade than the steel for casting. What I claim isv 1. The improvement in the art of manufacturing brake-shoes, which consists in forming parallel cavities in a heated blank of greater length than the finished shoe by dis- 2 5 placing the metal laterally, at the same time bending the blank into approximate final shape, then inserting in such cavities a clip, forcing back the displaced metal around the clips ends and thereby connecting the clip and blank, and finally bending the blank into final shape and compressing it longitudinally and forming the ends of the shoe, substantially as described.

2. Apparatus for forging brake-shoes, comprehending a pair of first-operation dies, the male die having the lateral-displacement and cavity-forming projections g and the female die having its matrix provided with cavities in line with the projections of the male die, the co-operating faces of the dies being de- 0 scribed on an arc of a circle differing from that of the finished shoe, substantially as described.

3. Apparatus for forging brake-shoes, comprehending a pair of finishing-dies consisting of a male die provided with a walled cavity to encompass the clip, cavities for forming the end lips, and projections for forming the end lugs and a female die whose matrix is of less length and width than the extreme length and width of the blank to be treated and described on an arc of a circle of ditferent radius than the blank, substantially as described.

In testimony whereof I have hereunto set my hand this 26th day of April, A. D. 1892.

CHARLES T. SCHOEN.

Witnesses:

B. O. J ACQUETT, ROUGIER THORNE. 

